1.What
are we hoping to accomplish when we use water treatment columns before running
a bioassay?

2.Based
on your data for the untreated chemical solutions, would you say that this
compound is toxic to lettuce seeds?Describe any trends you found in the average radicle length for the
series of concentrations of untreated solutions.

3.Which
(if any) of the three treatment columns removed a substance that is toxic to
your bioassay organisms? How can you tell?

4.For
the treatment column that worked best, what ions or compounds do you think are
present in the solution after it has been treated?Draw an illustration showing what ions go into the top of the
column and what ions you think are in the effluent that drains out the bottom.

5.Describe
in your own words how this column purified the cupric chloride solution.

6.How
do the radicle lengths of the seeds grown in effluent from this column compare
to the control group?

7.What
can you conclude – were you able to detoxify the sample by treating it with
this column?

8.What
can you conclude about the toxicity of cupric chloride?Does the Cu+2 cation, theCl- anion, or the whole compound
cause the toxicity?What evidence leads
you to reach this conclusion?

9.Briefly
describe an experimental set-up you could use to attempt to classify
contaminants in an unknown such as water you have collected from a storm drain.